Wireless semiconductor device having low power consumption

a technology of semiconductor devices and wires, applied in the direction of power supply for data processing, liquid/fluent solid measurement, instruments, etc., can solve the problems of difficult stabilization of power, complex process of wireless tags, and power consumption that is required to be suppressed, so as to improve communication distance to readers/writers, low power consumption, and stable operation
US7487373B2Inactive Publication Date: 2009-02-03SEMICON ENERGY LAB CO LTD
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Patent Information

Authority / Receiving Office
US Β· United States
Patent Type
Patents(United States)
Current Assignee / Owner
SEMICON ENERGY LAB CO LTD
Publication Date
2009-02-03
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention provides a semiconductor device that power is stabilized by suppressing power consumption as much as possible. The semiconductor device of the invention includes a logic portion and a memory portion each including a plurality of transistors, a detecting portion for detecting one or both of operation frequencies of the logic portion and the memory portion, a Vth control for supplying a Vth control signal to one or both of the logic portion and the memory portion, and an antenna. Each of the plurality of transistors has a first gate electrode which is input with a logic signal, a second gate electrode which is input with the Vth control signal, and a semiconductor film such that the second gate electrode, the semiconductor film, and the first gate electrode are provided in this order from the bottom.
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Description

TECHNICAL FIELD

[0001] The present invention relates to a semiconductor device capable of transmitting and receiving data.BACKGROUND ART

[0002] In recent years, a semiconductor device has been developed and used as a CPU and a memory. Among them, a semiconductor device which consumes large power has a problem that a larger battery and a cooling fan are required, thereby the electronic apparatus itself is increased in size. In view of the foregoing, a composite semiconductor device is suggested, which has a structure where a wiring substrate and a package are attached to each other so as to satisfy high thermal conductivity and low elasticity.[Patent Document 1]

[0003] Japanese Patent Laid-Open No. 07-74282

[0004] A semiconductor device capable of transmitting and receiving data has been developed, which is called a wireless tag, an RFID tag, or the like. The semiconductor device which has been put to practical use comprises an antenna and a circuit formed using a semiconductor substrate (an...

Claims

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